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arXiv 1909.05087math.AP
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一类退化交叉扩散方程组弱解的存在唯一性

Existence and Uniqueness of Weak Solutions to a Class of Degenerate Cross Diffusion Systems

Dung Le

摘要:

我们考虑一类具有退化(或多孔介质型)扩散的交叉扩散系统,其灵感来自于具有零自扩散的数学生物学/生态学模型。标量方程的已知技术在这里不再可用,因为最大值/比较原理通常不可用于系统。然而,我们将在非退化系统的强解的温和可积性条件下,证明退化系统的弱解的存在性,并证明它们收敛于退化系统的弱解。将对Shigesada { \it et al.}引入的模型验证这些条件。证明了极限解和无界弱解的唯一性。

英文摘要:

We consider a class of cross diffusion systems with degenerate (or porous media type) diffusion which is inspired by models in mathematical biology/ecology with zero self diffusions. Known techniques for scalar equations are no longer available here as maximum/comparison principles are generally unavailable for systems. However, we will provide the existence of weak solutions to the degenerate systems under mild integrability conditions of strong solutions to nondegenerate systems and show that they converge to a weak solution of the degerate system. These conditions will be verified for the model introduced by Shigesada {\it et al.}. Uniqueness of limiting and unbounded weak solutions will also be proved.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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